000 00295nam a2200121Ia 4500
008 220201s2017 xx 000 0 eng d
100 _aChawla Shashi
245 2 _aA Textbook Of Enviormental Studies
250 _a9th rep
260 _bMc Graw Hill
_aDelhi
_c2017
300 _a8.8
942 _2ddc
999 _c10993
_d10993